Telegram apparently got 3 million signups during Facebook outage
https://www.cnet.com/news/telegram-apparently-got-3-million-signups-during-facebook-outage/
"I see 3 million new users signed up for Telegram within the last 24 hours," Telegram boss CEO Pavel Durov wrote. "Good. We have true privacy and unlimited space for everyone."
Telegram reported that it had 200 million active users this time last year, so Wednesday's gain is a reasonable jump for the service. Last April, it was banned in Russia, Durov's home country, sparking protests on the streets of Moscow.